134Cs-137Cs activity ratio in the biosphere from 1956 until 1966.
D000818:Animals; D000413:Alaska; D002170:Canada; D002587:Cesium Isotopes / Q000032:analysis; D005387:Finland; D005507:Food Contamination, Radioactive / Q000032:analysis; D008011:Lichens; D008460:Meat / Q000032:analysis; D011834:Radiation Monitoring; D012053:Reindeer; D013057:Spectrum Analysis; D013548:Sweden; D015022:Yugoslavia
D002587:Cesium Isotopes